Now call me cynical but as usual last night I charged my phone up over night as I have done for the last year and a bit with this phone. this morning a software update of 47mb appears. I download and install whilst on charge still As internet use seems to zap this phones battery. Update was sucessful and phone works fine.
I usually run out of batter around this time of day and as normal have plugged it in.
Instead of the lightning bolt symbol there is now a plus symbol which I am unsure of.
Any suggestions? I have tried swapping chargers and have the same plug symbol.

They've changed the charging icon?

turns out it is charging, well its now charging.
Its charging but there is no symbol to say so on the homescreen.
when I go onto an app or something where the battery switches up to the top the lightning symbol appears and its gone from low to nearly half way.